GATE XL 2021 Paper 1 — page 20

Questions 58–60 of 125. Imported answers require review unless explicitly marked reviewed.

The diagram describes the ABC model of flower patterning in Arabidopsis where the A, B and C functions are operational in the whorls (1+2), (2+3) and (3+4), respectively, in the wild-type flower. Removal of A or C function results in the floral organ arrangements as (carpel; stamen; stamen; carpel) or (sepal; petal; petal; sepal), respectively. Based on these observations, which ONE of the following molecular pathways is CORRECT for floral organ pattern generation? Arrow indicates activation and bar indicates inhibition.

Your answerChoose one option.

Diagram for Life Sciences question 13 (figure 2)

Diagram for Life Sciences question 13 (figure 3)

Diagram for Life Sciences question 13 (figure 4)

Diagram for Life Sciences question 13 (figure 5)

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Find the CORRECT match among the plant species in GROUP I, the predominant phytochemical in GROUP II and the economic/medicinal use in GROUP III.

GROUP I P. Syzygium aromaticum Q. Gracilaria sp. R. Catharanthus roseus S. Theobroma cacao T. Papaver somniferum

GROUP II i. Vinciline ii. Eugenol iii. Agar iv. Morphine v. Flavonols

GROUP III

Toothache relief

Desert jelly

Leukaemia treatment

Analgesic

Beverage

Your answerChoose one option.

P-i-1, Q-ii-3, R-iii-4, S-v-5, T-iv-2

P-ii-1, Q-iii-2, R-i-3, S-v-5, T-iv-4

P-ii-1, Q-iii-2, R-iv-4, S-i-3, T-v-5

P-i-2, Q-iii-3, R-iv-1, S-iii-5, T-v-4

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Match the genetically modified crop in GROUP I with the corresponding genetic element in GROUP II.

GROUP I P. Tomato with delayed fruit ripening Q. Herbicide-resistant soybean R. Insect-resistant cotton S. Soybean with modified oil content

GROUP II

EPS synthase

Δ12-Desaturase

Polygalacturonase

Bt-Cry protein

Your answerChoose one option.

P-3, Q-1, R-4, S-2

P-1, Q-3, R-2, S-4

P-2, Q-1, R-4, S-3

P-3, Q-2, R-4, S-1

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2021 · Paper 1

Question 13

Question 14

Question 15